Move all of the header files which are involved in modelling the LLVM IR

[oota-llvm.git] / lib / Analysis / IPA / FindUsedTypes.cpp

diff --git a/lib/Analysis/IPA/FindUsedTypes.cpp b/lib/Analysis/IPA/FindUsedTypes.cpp
index 51d1b419f3063e221d3d8f6fd66db58007ce5170..1c4f17d3819ae0e428cda21dfcfde8797c4e2122 100644 (file)
--- a/lib/Analysis/IPA/FindUsedTypes.cpp
+++ b/lib/Analysis/IPA/FindUsedTypes.cpp
@@ -1,32 +1,39 @@
-//===- FindUsedTypes.cpp - Find all Types used by a module ------------------=//
+//===- FindUsedTypes.cpp - Find all Types used by a module ----------------===//
 //
-// This pass is used to seek out all of the types in use by the program.
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass is used to seek out all of the types in use by the program.  Note
+// that this analysis explicitly does not include types only used by the symbol
+// table.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Analysis/FindUsedTypes.h"
-#include "llvm/Assembly/CachedWriter.h"
-#include "llvm/SymbolTable.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Module.h"
 #include "llvm/Support/InstIterator.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
 
-static RegisterAnalysis<FindUsedTypes>
-X("printusedtypes", "Find Used Types");
-
-// stub to help linkage
-void FindUsedTypes::stub() {}
+char FindUsedTypes::ID = 0;
+INITIALIZE_PASS(FindUsedTypes, "print-used-types",
+                "Find Used Types", false, true)
 
 // IncorporateType - Incorporate one type and all of its subtypes into the
 // collection of used types.
 //
-void FindUsedTypes::IncorporateType(const Type *Ty) {
-  if (UsedTypes.count(Ty)) return;  // Already contain Ty.
-                             
-  // If ty doesn't already exist in the used types map, add it now.
-  //
-  UsedTypes.insert(Ty);
-  
+void FindUsedTypes::IncorporateType(Type *Ty) {
+  // If ty doesn't already exist in the used types map, add it now, otherwise
+  // return.
+  if (!UsedTypes.insert(Ty)) return;  // Already contain Ty.
+
   // Make sure to add any types this type references now.
   //
   for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
@@ -34,36 +41,50 @@ void FindUsedTypes::IncorporateType(const Type *Ty) {
     IncorporateType(*I);
 }
 
+void FindUsedTypes::IncorporateValue(const Value *V) {
+  IncorporateType(V->getType());
+
+  // If this is a constant, it could be using other types...
+  if (const Constant *C = dyn_cast<Constant>(V)) {
+    if (!isa<GlobalValue>(C))
+      for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end();
+           OI != OE; ++OI)
+        IncorporateValue(*OI);
+  }
+}
+
 
 // run - This incorporates all types used by the specified module
 //
-bool FindUsedTypes::run(Module &m) {
+bool FindUsedTypes::runOnModule(Module &m) {
   UsedTypes.clear();  // reset if run multiple times...
 
   // Loop over global variables, incorporating their types
-  for (Module::const_giterator I = m.gbegin(), E = m.gend(); I != E; ++I)
+  for (Module::const_global_iterator I = m.global_begin(), E = m.global_end();
+       I != E; ++I) {
     IncorporateType(I->getType());
+    if (I->hasInitializer())
+      IncorporateValue(I->getInitializer());
+  }
 
   for (Module::iterator MI = m.begin(), ME = m.end(); MI != ME; ++MI) {
     IncorporateType(MI->getType());
     const Function &F = *MI;
-  
+
     // Loop over all of the instructions in the function, adding their return
     // type as well as the types of their operands.
     //
     for (const_inst_iterator II = inst_begin(F), IE = inst_end(F);
          II != IE; ++II) {
-      const Instruction *I = *II;
-      const Type *Ty = I->getType();
-    
-      IncorporateType(Ty);  // Incorporate the type of the instruction
-      for (User::const_op_iterator OI = I->op_begin(), OE = I->op_end();
+      const Instruction &I = *II;
+
+      IncorporateType(I.getType());  // Incorporate the type of the instruction
+      for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
            OI != OE; ++OI)
-        if ((*OI)->getType() != Ty)         // Avoid set lookup in common case
-          IncorporateType((*OI)->getType());// Insert inst operand types as well
+        IncorporateValue(*OI);  // Insert inst operand types as well
     }
   }
- 
+
   return false;
 }
 
@@ -71,15 +92,10 @@ bool FindUsedTypes::run(Module &m) {
 // passed in, then the types are printed symbolically if possible, using the
 // symbol table from the module.
 //
-void FindUsedTypes::print(std::ostream &o, const Module *M) const {
-  o << "Types in use by this module:\n";
-  if (M) {
-    CachedWriter CW(M, o);
-    for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
-           E = UsedTypes.end(); I != E; ++I)
-      CW << "  " << *I << "\n";
-  } else
-    for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
-           E = UsedTypes.end(); I != E; ++I)
-      o << "  " << *I << "\n";
+void FindUsedTypes::print(raw_ostream &OS, const Module *M) const {
+  OS << "Types in use by this module:\n";
+  for (SetVector<Type *>::const_iterator I = UsedTypes.begin(),
+       E = UsedTypes.end(); I != E; ++I) {
+    OS << "   " << **I << '\n';
+  }
 }